#include <stdio.h>
#include <stdlib.h>
#include <omp.h>

void Hello(void); 

int main(int argc, char* argv[]){
    int thread_count = strtol(argv[1], NULL, 10);

#   pragma omp parallel num_threads(thread_count)    
    Hello();

    return 0;

}

void Hello(void) {
    int my_rank = omp_get_thread_num();
    int thread_count = omp_get_num_threads();

    printf("Hello from thread %d of %d\n", my_rank, thread_count);
}